You generally become fully liable to tax in Denmark if you stay in Denmark for an uninterrupted period exceeding 6 months. Short trips abroad for holidays or similar purposes may still count as part of the continuous stay. Full tax liability applies from the beginning of the stay. This tracker uses 183 days as an approximation of the legal “more than 6 months” test. Tax liability may also arise from taking up residence in Denmark, regardless of this tracker.
https://skat.dk/en-us/individuals/taxation-in-denmark/tax-liability